from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import request
from flask import session

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from flask import render_template

from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route('/comment_like', methods=["POST"])
@user_login_data
def set_comment_like():
    if not g.user:
        return jsonify(errno=RET.SESSIONERR,errmsg='用户未登录')
    # 获取参数
    comment_id = request.json.get('comment_id')
    news_id = request.json.get('news_id')
    action = request.json.get('action')

    # 判断参数
    if not all([comment_id,news_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    if action not in ("add", "remove"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

        # 查询评论数据
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论数据不存在")

    if action == "add":
        comment_like = CommentLike.query.filter_by(comment_id=comment_id, user_id=g.user.id).first()
        if not comment_like:
            comment_like = CommentLike()
            comment_like.comment_id = comment.id
            comment_like.user_id = g.user.id
            db.session.add(comment_like)
            # 增加点赞条数
            comment.like_count += 1
    else:
        # 删除点赞数据
        comment_like = CommentLike.query.filter_by(comment_id=comment_id, user_id=g.user.id).first()
        if comment_like:
            db.session.delete(comment_like)
            # 减小点赞条数
            comment.like_count -= 1

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="操作失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")

@news_blu.route('/news_comment', methods=["POST"])
@user_login_data
def add_news_comment():
    """添加评论"""

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 获取参数
    data_dict = request.json
    news_id = data_dict.get("news_id")
    comment_str = data_dict.get("comment")
    parent_id = data_dict.get("parent_id")

    if not all([news_id, comment_str]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数不足")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="该新闻不存在")

    # 初始化模型，保存数据
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_str
    if parent_id:
        comment.parent_id = parent_id

    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="保存评论数据失败")

        # 返回响应
    return jsonify(errno=RET.OK, errmsg="评论成功", data=comment.to_dict())



@news_blu.route('/news_collect',methods=['POST'])
@user_login_data
def news_collect():
    user = g.user
    news_id = request.json.get('news_id')
    action = request.json.get('action')
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    if not news_id:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("collect", "cancel_collect"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="新闻数据不存在")

    if action == "collect":
        user.collection_news.append(news)
    else:
        user.collection_news.remove(news)
    return jsonify(errno=RET.OK, errmsg="操作成功")

@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):

    # 获取当前登录用户id
    user = g.user
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    click_news_list = []
    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())

    # 查询新闻数据
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)
    #更新点击数
    news.clicks +=1

    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids = []
    if g.user:
        try:
            comment_ids = [comment.id for comment in comments]
            # if len(comment_ids) > 0:
                # 取到当前用户在当前新闻的所有评论点赞的记录
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                         CommentLike.user_id == g.user.id).all()
                # 取出记录中所有评论ｉｄ
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)
    comment_list = []
    for item in comments if comments else []:
        comment_dict = item.to_dict()
        comment_dict["is_like"] = False
        # 判断是否点赞该评论
        if item.id in comment_like_ids:
            comment_dict["is_like"]= True
        comment_list.append(comment_dict)

    # 判断是否收藏该新闻，默认值为 false
    is_collected = False
    # 判断用户是否收藏过该新闻
    if g.user:
        if news in g.user.collection_news:
            is_collected = True

    data ={
        "user": user.to_dict() if user else None,
        "click_news_list": click_news_list,
        "news": news.to_dict(),
        "is_collected":is_collected,
        "comments":comment_list
    }

    return render_template('news/detail.html',data=data)